We are live on ! Find out more
William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+12.61%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$36B
AUM Growth
+$2.85B
Cap. Flow
-$222M
Cap. Flow %
-0.62%
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87

Top Buys

Rank Stock Value
1
GEV icon
GE Vernova
GEV
+$116M
2
BA icon
Boeing
BA
+$34M
3
CWAN
Clearwater Analytics
CWAN
+$31.2M
4
NVDA icon
NVIDIA
NVDA
+$27.5M
5
NET icon
Cloudflare
NET
+$26.2M

Top Sells

Rank Stock Value
1
XYZ
Block Inc
XYZ
+$79.4M
2
ZTS icon
Zoetis
ZTS
+$41.3M
3
ACN icon
Accenture
ACN
+$40.8M
4
IJH icon
iShares Core S&P Mid-Cap ETF
IJH
+$40.7M
5
UNH icon
UnitedHealth
UNH
+$36.4M

Sector Composition

Rank Sector Weight
1 Technology 27.47%
2 Financials 13.92%
3 Industrials 12.94%
4 Healthcare 11.51%
5 Consumer Discretionary 7.98%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PRN icon
1776
Invesco Dorsey Wright Industrials Momentum ETF
PRN
$431M
$3.46K ﹤0.01%
22
– –
EWI icon
1777
iShares MSCI Italy ETF
EWI
$1.07B
$3.27K ﹤0.01%
68
– –
VXX icon
1778
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$147M
$3.27K ﹤0.01%
68
– –
HEZU icon
1779
iShares Currency Hedged MSCI Eurozone ETF
HEZU
$586M
$3.24K ﹤0.01%
+79
New +$3.13K
PGJ icon
1780
Invesco Golden Dragon China ETF
PGJ
$98.4M
$3.12K ﹤0.01%
110
– –
PEZ icon
1781
Invesco Dorsey Wright Consumer Cyclicals Momentum ETF
PEZ
$22.9M
$3.08K ﹤0.01%
31
– –
SEATW icon
1782
Vivid Seats Inc Warrant
SEATW
$3.08K ﹤0.01%
22,000
– –
XRLV
1783
DELISTED
Invesco S&P 500 ex-Rate Sensitive Low Volatility ETF
XRLV
$3.03K ﹤0.01%
55
– –
CYPH
1784
Cypherpunk Technologies Inc
CYPH
$76.3M
$2.97K ﹤0.01%
10,000
– –
ECH icon
1785
iShares MSCI Chile ETF
ECH
$1.07B
$2.92K ﹤0.01%
+93
New +$2.89K
SILJ icon
1786
Amplify Junior Silver Miners ETF
SILJ
$3.86B
$2.81K ﹤0.01%
190
– –
ISCV icon
1787
iShares Morningstar Small-Cap Value ETF
ISCV
$704M
$2.76K ﹤0.01%
45
-5
-10% -$292
EBND icon
1788
State Street SPDR Bloomberg Emerging Markets Local Bond ETF
EBND
$2.29B
$2.69K ﹤0.01%
126
+1
+0.8% +$21
NORW icon
1789
Global X MSCI Norway ETF
NORW
$88.2M
$2.54K ﹤0.01%
87
– –
MILN
1790
Global X Millennial Consumer ETF
MILN
$102M
$2.44K ﹤0.01%
50
-100
-67% -$4.48K
EWP icon
1791
iShares MSCI Spain ETF
EWP
$2.17B
$2.38K ﹤0.01%
54
– –
PBP icon
1792
Invesco S&P 500 BuyWrite ETF
PBP
$362M
$2.36K ﹤0.01%
108
– –
EFNL icon
1793
iShares MSCI Finland ETF
EFNL
$247M
$2.29K ﹤0.01%
+56
New +$2.18K
IYT icon
1794
iShares US Transportation ETF
IYT
$2.29B
$2.19K ﹤0.01%
32
– –
USDU icon
1795
WisdomTree Bloomberg US Dollar Bullish Fund
USDU
$457M
$2.19K ﹤0.01%
85
-306
-78% -$8.05K
ARGT icon
1796
Global X MSCI Argentina ETF
ARGT
$830M
$2.12K ﹤0.01%
25
– –
PGF icon
1797
Invesco Financial Preferred ETF
PGF
$673M
$2.12K ﹤0.01%
150
-1,200
-89% -$16.8K
CORZZ icon
1798
Core Scientific Inc Tranche 2 Warrants
CORZZ
$1.76B
$2.08K ﹤0.01%
121
– –
XSLV icon
1799
Invesco S&P SmallCap Low Volatility ETF
XSLV
$247M
$1.91K ﹤0.01%
42
– –
IMCB icon
1800
iShares Morningstar Mid-Cap ETF
IMCB
$1.7B
$1.51K ﹤0.01%
19
– –
70 71
72
73 74

Similar funds

SAM
Storebrand Asset Management Lysaker, Norway $34.8B AUM 25.49% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Pacer Advisors
Pacer Advisors Malvern, Pennsylvania $35.6B AUM 18.19% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return
MML Investors Services
MML Investors Services Springfield, Massachusetts $36.1B AUM 19.68% 1-Year Est. Return

William Blair & Company's Q2 2025 Portfolio in Review

As of Q2 2025, William Blair & Company held 1,911 positions worth $36B, up 8.6% from $33.2B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company's Q2 2025 filing shows 111 new, 662 increased, 757 reduced and 87 closed positions. Its largest new stake was Affirm: 304,959 shares worth $21.1M. The largest sale was Block Inc, an estimated $79.4M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 26% a quarter earlier, followed by Financials and Industrials.

  • William Blair & Company's largest Q2 2025 buy was Affirm: 304,959 shares worth $21.1M.
  • William Blair & Company added most to GE Vernova in Q2 2025, an estimated $116M increase.
  • William Blair & Company's biggest Q2 2025 reduction was Block Inc, cutting an estimated $79.4M.
  • William Blair & Company fully exited Discover Financial Services in Q2 2025, selling an estimated $5.21M.
  • William Blair & Company's ten largest holdings make up 25% of its $36B portfolio in Q2 2025.
  • William Blair & Company opened 111 new positions and closed 87 in Q2 2025.
  • William Blair & Company's portfolio value rose 8.6% quarter-over-quarter to $36B.

Based on William Blair & Company's 13F filing for Q2 2025, filed 24 Jul 2025.